Electrical operating means for doors.



I. R. KAISEHIVIAN. ELECTRICAL .OPERATING IIIIIEAINS FOR D00 APPLICATION FILED AUB. I5, 19|?- Patented Dee.. 4, V191?.

IIIIIIIIIIIIIIIIIIIIIII ATTORNEYS -pawl merely 1i sans @Millar JACOB BUDLPH KAISERMAN, 0F LIVINGSTON, MONTANA.

ELECTRICAL OPERATING MEANSFOR DOORS.

specification of Leiters raient. Patented insee., Ll, Mitt.

npplication led August 16, 1917. Serial lilo. a.

To all whom it may concern:

Be it known that L JACOB R. Kaisninimn, a citizen of the United States, and a resident of Livingston, in the county of Park and State of Montana, have invented a new and improved Electrical Operating Means for Doors, of which the following is a full, clear, and exact description. T

This invention relates to electrical operating' means for doors lwhereby the door is opened by an electric motor, the circuit of which is controlled by a knob, latch or other device, and in the opening of the door a spring is wound, which serves as a closing motor, there being means for permitting the door to be operated by hand if the power should fail.

The invention has for its general objects to improve and simplify the construction and operation of door-operating devices so y simple and inexpensive to manufac- ,and so designed that the door can be opened by hand if power for the motor should fail, without altering any of the operating connections between the motor and door.

A further object of the invention is the provision of a friction device of novel construction and arrangement, whereby the door is prevented from closing too rapidly under the energy stored in the wound spring, and also the provision of a pawl and ratchet which permits the door to be opened by hand faster than the motor normally drives it, and also in case the power should fail the triction of the dead motor is overcome by the overriding the ratchet, and again on closing, when the door is brought to a closed position, the pawl and ratchet will prevent the revolving eilect of the motor under inertia from exerting undue presslire on the parts of the mechanism.

Still another object of the invention is the provision of a switch in the motor circuit which will open the said circuit automatically after the door is fully opened and when the operator holds the controlling switch closed too long.

With such objects in view, and others ,he reliable and eiticient in use, compara- 'v l tu e which will appear as the description proceeds, the invention comprises various novel features of construction and arrangement of l parts which will be set t'orth with partienlarity in the following description and claims appended hereto.

In the accompanying drawing, which illusn trates one embodiment of the invention and wherein similar characters of reference indicate rotresponding parts in all the views,

Figure l is a vertical section oi the apparams;

Fig. 2 is a horizontal section on the line 2 2, Fig. l, with the electric circuit shown in diagram;

Fig. 3 is a detail sectional view on the line 3 3, Fig. 1, showing the retarding device; and

Fig. 4 is a perspective viewmshowing the apparatus applied to a swinging door.

In the'present instance the apparatus is shown in connection with a swinging door, but it is to be understood that it can be applied to sliding doors also. In Fig. it, A. designates the door, B the door frame, C the door operating mechanism that includes a rotary shaft l, an arm 2 fastened thereto, and a link 3 connecting the tree end of? the arm with the door traine, whereby swinging oi the arm 2 will cause the door to open or close. In case of a sliding door a sprocket or wheel may be mounted on the shatft l and operate in connection with an endless chain or cable to cause the door to open and close.

The door-operating mechanism C incliides a casing 4. in which is contained an electric motor 5, the shaft t3 ot which has a pinion 7. llleshing with this pinion is a gear l 8 on a shaft 9, which gear wheel also met i with a pinion 10 keyed to a second shaft 1lL On this shaft il is a loose gear Wheel 'l2 that meshes with a pinion 13 fastened to the gear wheel 8, and on the gear 12 is ay pinion 'llt which meshes with a gear wheel 15 loose on the shaft 1. The gear 15 has ratchet teeth 1G with which engages a pawl 17 carried by a drum 18, this drum being keyed to shaft l., A spring iias its inner end fastened to the drum and its outer end fastened to the cas ing at 20, Fig. 2, and consequently when, the

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motor operates to open the door the gear 15 will drive the drum 18 through lthe ratchet 16 and pawl 17 turning' the shaft 1 and winding the spring 15).

The retarding device includes a stationary brake ring 21 within which are centrifugally acting weights 22, 1 and 3, which are mounted on a carrier Q3 loose on the Shaft 11. This carrier includes a drum Q4 which forms part ot a clutch. lVithin the drum is a clutch element 25 keyed to the shal't 11, said element. having cam surfaces 26 which coperate with the drum 24: to form wedge-shaped pockets into which are adapted to wedge the balls 27. These balls do not have any clutching action during the openingot the door by the operation of the motor 5, but when the door closes under the tension of the spring 19 the shatt 11 will be rotated through the gear 15, pinion 14, gear 12, pinion 13, gear 8, and pinion 10. The rotation of the shatt 11 causes the carrier Q3 to be clutched to the shaft 11, since the balls 27 wedge in the narrow parts of the clutch pockets. The rotation Vof the carrier Q3 ca uses the weights 22 to tly outwardly and frictionally engage the brake ring 21 and thereby retard the whole mechanism, which in turn retards the closing` of the door.

The motor 5 is adapted to be connected in circuit by the operation of a door knob, latch or other device adjacent to the door or by a switch at a remoteL point. The circuit connections and controlling means are shown in Fig. 2, wherein D designates a source ot current which is connected by a wire 30 with one terminal of the motor 5, and the other terminal is connected by a wire 31 with a switch'E, which comprises two contacts 32 and 33 normally engaged or in circuitclosing position. The contact 33 is connected by a wire 34 with the door lock. The drawing shows a latch bolt 35 ot' a .loclr which is adapted to be operated in the usual manner by a knob, and on this bolt is a movable contact 36 arranged to engage a fixed contact 37 connected by a wire 38 with the source ot current D. In order to prevent. the motor circuit t'rom being closed While the door is locked, the locking bolt 39 has a contact: 40 to which the wire 34 is connected, and 4this movable contact 40 is adapted to engage a fixed contact 41 when the bolt 39 is in unlocking position, the contact @il being connected by a wire 42 with the contact 36. lt will thus be Seen that the two switches formed by the contacts 36, 37 and ll0, 41 are in series, and when they are both closed the motor will be operated. When the door knob or latch is operated the motor 5 will rotate as lonfbl as the circuit is held closed` and it the circuit should be held closed longer than necessary to open the door, an arm 43 on the shaft 1, Fig. 2,

will engage the switch contact 33' and open the motor circuit at the switch E, so that the motor will stop and undue strain on the 'operating mechanism will be avoided. f

From the foregoing description taken in connection with the accompanying drawing, the advaiitages ot the construction and method o1 operation will be readily understood b v those skilled in the art to which the invention appertains, and while I have described the principle of operation, t0- gether with the apparatus which now consider to be the best embodiment thereof, I desire to have it understood that the apparatus shown is merely illustrative and that such changes may be made when desired as fall within the scope of the appended claims.

Having thus described my invention, I claim as new and desire to secure by Letters Patent: Y y

l. The combination of a door, a shaft operatively connected with the door for moving the same, a motor, power-transmitting means between the motor and Said shaft, a spring connected with the said shaft and adapted to wind during the opening of the door by the said motor, a ratchet and pawl mechanism between the spring and said means` for permitting the door-to be operated independently ot' the motor, and an automatic device operatively connected with the said means to retard the closing movement ot the door under the action of the said spring.

2. The eombinationof a door, a shaft 0peratively connected with the door for moving the same, a motor, power-transmittin means between spring connected with the said shaft-"and adapted to wind during the opening of the door by the said motor, a ratchet and pawl mechanism between the springr and said means for permitting the door to be operated indepcndently of the motor, an automatic device operatively connected with the said means to retard the closing movement ofthe door under the action of the said spring, a circuit 'for the motor, means for closing the motor circuit to open the door, and a switch in said circuit and arranged to be opened automatically when the `door is t'ully opened.

The combination of a door, a Shaft operatively connected therewith, a spring connected with the shaft to Wind as the shaft opens the door, a gearing, a ratchet and pawl device between the gearing and spring, a motor connected with the gearing, a brake means associated with the gearing, and a clutch connecting the brake means with thc gearing only when the closing movement of the door in one direction exceeds apredetermined rate of travel.

the motor and said shaft, a.`

Il. The combination of a door, a shaft 0peratively connected therewith, a, spring e011- nected with the shaft to Wind as the shaft opens the door, a gearing, a ratchet and' 5 pawl device between the gearing'and spring, a motor connected with the gearing; a brake means associated with the gearing, a clutch connecting the brake means with the gearing only when the closing movement of the door in one direction exceeds a precleter mined rate of travel, a circuit vi'or the said motor, a controller for the circuit, and a switch for automatically openingI the eircuit when the door is fully operiecl.

JACOB RDGLPH KMSERMAN; 

